SMA Solar Technology AG
Electrical installations (for North America)
All installations must conform with the laws, regulations, codes and standards applicable in the
jurisdiction of installation (e.g. National Electrical Code
®
Electrical Code
CSA-C22.1.).
• Before connecting the product to the utility grid, contact your local grid operator. The
electrical connection of the product must be carried out by qualified persons only.
• Ensure that the cables or conductors used for electrical connection are not damaged.
Grounding conductor test prior to recommissioning
Prior to recommissioning SMA inverters after the installation of SMA components or power
assemblies which cannot be replaced intuitively, ensure that the grounding conductor in the
inverter is correctly connected. The function of the grounding conductor must be ensured and
all locally applicable laws, standards and directives must be observed.
Observe superordinate standards
The repair work on devices and the consideration and application of other standards which
correspond to a superordinate standard is the responsibility of the qualified person performing
the work. Unauthorized alterations will void guarantee and warranty claims and in most cases
terminate the operating license. SMA Solar Technology AG shall not be held liable for any
damage caused by such changes.
3
Overview of Assemblies
A
Connection Unit
Figure 1 : Position of the assemblies in the inverter
Position
Designation
A
DC load-break switch
B
AC load-break switch (only present with STP 50-US-40 / STP 33-US-41 / STP
50- US-41 / STP 62-US-41)
Replacement Manual
DC-Power Unit
DCEMV
DC-
ACRLY
AC-Power Unit
®
ANSI/NFPA 70 or Canadian
DST
AST
STP50-DC-EMV-DST-RM-xx-12
3 Overview of Assemblies
AC-
Connection Unit
B
11